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Description:Features:1.It has pickup box(collect outside sound),you can wear it in the colloar,pocket or other places. 2.Ergonomics design, balance wear, tight on the ear. 2.Noise Reduction echo technology delivers dynamic sound and truly powerful bass. 3.Sweat-resistant design with Nanotechnology (Up to IPX7) . Specifications: Frequency range: 20~20kHz Microphone sensitivity:-54±2dB Operating time: 10±0.3 hours Standby time: over 60 days Input: DC5.0±0.5V, Max500mA Battery: Li-ion battery capacity 3.7V 350mAH It is designed for: Hearing defects because of the life schedule (seriously affecting the learning efficiency, and leaving a shadow to the children's life). Hearing defects because of the work environment and work pressure (easily to work in the unequal treatment).Deafness because of the decline in physical function (easy to make the elderly living boring, affect the mood of the elderly, and reduce the quality of life of the elderly, more likely to cause depression and mental illness in the elderly). How to use it: Place the vibrator at the front or back of the ear. Vibrator do not put on the ear.? Fix the 'Sound pick up' on the collar or shirt packet with 'Wear clamps. Note: the pickup box is not waterproof design. do not use wet cloth to clean this part. Particularly, The chemical solvent cleaning can not be use! such as: pure alcohol, acetone, etc. Package included: 1x Bone Conduction Hearing Aids Headphone 1x user manual1x USB cord